from utils import read_json_file, write_jsonl_file, parse, write_json_file
import os


def get_aligned_index(text, non_space_len, include_tail_space=True):
    cursor = 0
    while non_space_len >= 0 and cursor < len(text):
        if not include_tail_space and non_space_len == 0:
            break
        if include_tail_space and non_space_len == 0 and text[cursor] != " ":
            break

        if text[cursor] != " ":
            non_space_len -= 1

        cursor += 1

    return cursor


def parse_slot2index(slots, text, tokens):
    slot2index = dict()
    prefix_length = [0]
    for token in tokens:
        prefix_length.append(prefix_length[-1] + len(token))

    for trip in slots:
        start = get_aligned_index(text, prefix_length[trip["start"]])
        end = get_aligned_index(text, prefix_length[trip["exclusive_end"]], False)
        if trip["slot"] not in slot2index:
            slot2index[trip["slot"]] = dict()

        value = text[start:end]
        # if text not in [
        #     "there are none available for 8 pm , but there is one at 6.15 pm . would you like 6.15 pm instead ?",
        #     "8 pm is unavailable at 8 pm has been declined by oren hummus . you can choose another time such as 7.15 pm , 7.30 pm , or 8.30 pm .",
        #     "8 pm is not available on wednesday . i was unable to book your table on wednesday night at cetrella for 3 people .",
        # ]:
        #     assert value not in slot2index[trip["slot"]], value
        if value not in slot2index[trip["slot"]]:
            slot2index[trip["slot"]][value] = (start, end)
    return slot2index


def get_slot_index(slot2index, value, slot):
    if slot not in slot2index or value not in slot2index[slot]:
        # print(slot, value)
        return -1, -1
    return slot2index[slot][value]


def parse_dialogue_acts(acts, utter_dict, domain):
    dialog_acts = []
    text = utter_dict["text"]
    # print(utter_dict)
    # print(acts)
    # print()
    slot2index = parse_slot2index(utter_dict["slots"], text, utter_dict["tokens"])

    act_slot_values = dict()
    for act in acts:
        if act["type"] not in act_slot_values:
            act_slot_values[act["type"]] = dict()

        if "slot" in act:
            if act["slot"] not in act_slot_values[act["type"]]:
                act_slot_values[act["type"]][act["slot"]] = []

            if "value" in act:
                act_slot_values[act["type"]][act["slot"]].append(act["value"])

    for act in act_slot_values:
        svt = []
        for slot, values in act_slot_values[act].items():
            svp = {
                "slot": slot,
            }

            if values:
                svp["values"] = []
                svp["relation"] = "="
                for value in values:
                    start, end = get_slot_index(slot2index, value, slot)
                    if start != -1:
                        assert value == text[start:end], f"{value} {text[start: end]}"
                        svp["values"].append(
                            {"value": value, "start": start, "end": end}
                        )
                    else:
                        svp["values"].append({"value": value})
            svt.append(svp)

        dialog_acts.append({"act": act, "slot_value_table": svt, "domain": domain})

    return dialog_acts


def parse_dialogue_state(state, intent, domain, schema):
    svt = []

    for pair in state:
        svt.append(
            {
                "slot": pair["slot"],
                "values": [{"value": pair["value"]}],
                "relation": "=",
            }
        )

        schema[domain].add(pair["slot"])

    dialog_state = [
        {"intent": intent, "informed_slot_value_table": svt, "domain": domain}
    ]

    return dialog_state, schema


def reformat(args, file, domain):
    path = args.input_dir + "/" + file + ".json"
    data = read_json_file(path)
    processed_data = []

    schema = {domain: set()}

    for origin_dial in data:
        dialog = {"turn": "multi", "locale": "en", "dialog": []}
        origin_turns = origin_dial["turns"]
        intent = origin_turns[0]["user_intents"]

        assert len(intent) == 1
        intent = intent[0]

        for origin_turn in origin_turns:
            # system
            if "system_utterance" in origin_turn:
                new_turn = {
                    "roles": ["SYSTEM"],
                    "utterance": origin_turn["system_utterance"]["text"],
                    "dialog_acts": parse_dialogue_acts(
                        origin_turn["system_acts"],
                        origin_turn["system_utterance"],
                        domain,
                    ),
                }
                dialog["dialog"].append(new_turn)

            # user
            bs, schema = parse_dialogue_state(
                origin_turn["dialogue_state"], intent, domain, schema
            )
            new_turn = {
                "roles": ["USER"],
                "utterance": origin_turn["user_utterance"]["text"],
                "dialog_acts": parse_dialogue_acts(
                    origin_turn["user_acts"], origin_turn["user_utterance"], domain
                ),
                "belief_state": bs,
            }
            dialog["dialog"].append(new_turn)
        processed_data.append(dialog)

    write_jsonl_file(processed_data, args.output_dir + "/" + file + ".jsonl")

    schema[domain] = sorted(list(schema[domain]))

    ontology = {domain: {slot: True for slot in schema[domain]}}

    write_json_file(ontology, os.path.join(args.output_dir, f"{file}_ontology.json"))


def preprocess(args, domain):
    reformat(args, "train", domain)
    reformat(args, "dev", domain)
    reformat(args, "test", domain)


if __name__ == "__main__":
    args = parse()
    preprocess(args, args.domain)